in still water, a boat average 6 miles per hour. It takes the same amount of time to travel 20 miles downstream with the current, as it does 10 miles upstream, against the current, what is the rate of the current?

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Which table represents a linear function? i'll give brainliest to first answer ^'^

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?